Omega caliber 8521
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8521 description
Self-winding movement with Co-Axial Escapement for greater precision, stability and durability. Free sprung-balance system with silicon balance-spring. Automatic winding in both directions to reduce winding time. Oscillating mass and balance bridge in 18 Ct red gold. Luxury finish with exclusive Geneva waves in arabesque.
Other calibers that are based on the Omega 8521:
All watches using the Omega 8521 movement:
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231.50.30.20.06.001
Omega Seamaster Aqua Terra 150M Co-Axial 30 Red Gold / Grey / Bracelet

231.58.30.20.55.002
Omega Seamaster Aqua Terra 150M Co-Axial 30 Yellow Gold / Diamond / MOP

231.55.30.20.55.002
Omega Seamaster Aqua Terra 150M Co-Axial 30 Yellow Gold / Diamond / MOP / Bracelet

231.55.30.20.55.001
Omega Seamaster Aqua Terra 150M Co-Axial 30 Red Gold / Diamond / MOP / Bracelet

123.50.31.20.13.001
Omega Constellation Co-Axial 31 Red Gold / Brown

123.50.31.20.05.001
Omega Constellation Co-Axial 31 Red Gold / MOP

123.50.31.20.55.001
Omega Constellation Co-Axial 31 Red Gold / MOP

123.55.31.20.55.001
Omega Constellation Co-Axial 31 Red Gold / Diamond / MOP Supernova

123.55.31.20.63.001
Omega Constellation Co-Axial 31 Red Gold / Diamond / Brown Supernova

123.50.31.20.05.002
Omega Constellation Co-Axial 31 Yellow Gold / MOP

123.50.31.20.08.001
Omega Constellation Co-Axial 31 Yellow Gold / Champagne

123.55.31.20.55.002
Omega Constellation Co-Axial 31 Yellow Gold / Diamond / MOP Supernova

123.55.31.20.58.001
Omega Constellation Co-Axial 31 Yellow Gold / Diamond / Champagne Supernova

123.50.31.20.55.002
Omega Constellation Co-Axial 31 Yellow Gold / MOP

123.50.27.20.55.001
Omega Constellation Co-Axial 27 Brushed Red Gold / MOP Supernova

123.50.27.20.55.002
Omega Constellation Co-Axial 27 Brushed Yellow Gold / MOP Supernova

123.50.27.20.57.001
Omega Constellation Co-Axial 27 Brushed Red Gold / Brown MOP

123.50.27.20.58.001
Omega Constellation Co-Axial 27 Brushed Yellow Gold / Champagne Supernova

123.55.27.20.55.001
Omega Constellation Co-Axial 27 Brushed Red Gold / Diamond / MOP Supernova

123.55.27.20.55.002
Omega Constellation Co-Axial 27 Brushed Yellow Gold / Diamond / MOP Supernova

123.55.27.20.57.001
Omega Constellation Co-Axial 27 Brushed Red Gold / Diamond / Brown MOP

231.18.34.20.55.001
Omega Seamaster Aqua Terra 150M Co-Axial 34 Stainless Steel / Diamond / MOP

231.50.34.20.01.001
Omega Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Black / Bracelet

231.50.34.20.01.002
Omega Seamaster Aqua Terra 150M Co-Axial 34 Red Gold / Black / Bracelet

231.53.34.20.01.001
Omega Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Black

231.53.34.20.01.002
Omega Seamaster Aqua Terra 150M Co-Axial 34 Red Gold / Black

231.55.34.20.55.001
Omega Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet

231.55.34.20.55.002
Omega Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet

231.58.34.20.55.001
Omega Seamaster Aqua Terra 150M Co-Axial 34 Yellow Gold / Diamond / MOP

231.58.34.20.55.002
Omega Seamaster Aqua Terra 150M Co-Axial 34 Red Gold / Diamond / MOP

232.58.38.20.01.001
Omega Seamaster Planet Ocean 600M Co-Axial 37.5 Red Gold / Diamond / Alligator

232.58.38.20.04.001
Omega Seamaster Planet Ocean 600M Co-Axial 37.5 Red Gold / Diamond / White / Alligator

425.65.34.20.55.006
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP / Diamond Bracelet

425.65.34.20.63.003
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Brown / Diamond Bracelet

425.65.34.20.55.004
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet

425.65.34.20.55.003
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / MOP/ Bracelet

425.65.34.20.63.002
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Brown / Bracelet

425.68.34.20.55.003
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP

425.68.34.20.63.002
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Brown

425.68.34.20.55.004
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / MOP

425.65.34.20.55.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet

425.65.34.20.51.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / Black / Bracelet

425.68.34.20.55.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP

425.68.34.20.51.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / Black

425.65.34.20.63.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Brown / Bracelet

425.68.34.20.55.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / MOP

425.68.34.20.51.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Black

425.68.34.20.63.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Brown

425.60.34.20.63.001
Omega LadyMatic Co-Axial 34 Red Gold / Brown / Bracelet

425.60.34.20.51.001
Omega LadyMatic Co-Axial 34 Red Gold / Black / Bracelet

425.60.34.20.55.001
Omega LadyMatic Co-Axial 34 Red Gold / MOP / Bracelet

425.63.34.20.55.001
Omega LadyMatic Co-Axial 34 Red Gold / MOP

425.63.34.20.51.001
Omega LadyMatic Co-Axial 34 Red Gold / Black

123.55.27.20.55.004
Omega Constellation Co-Axial 27 Polished Red Gold / Snow / MOP Supernova

123.55.27.20.55.003
Omega Constellation Co-Axial 27 Polished Red Gold / Waxing Moon Snow / MOP Supernova

123.55.27.20.05.002
Omega Constellation Co-Axial 27 Brushed Yellow Gold / Diamond / MOP Stars

123.55.27.20.05.001
Omega Constellation Co-Axial 27 Brushed Yellow Gold / Diamond / MOP Stars

123.55.27.20.05.004
Omega Constellation Co-Axial 27 Brushed Red Gold / Diamond / MOP Stars

123.55.27.20.05.003
Omega Constellation Co-Axial 27 Brushed Red Gold / Diamond / MOP Stars

425.65.34.20.55.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / MOP / Bracelet

425.65.34.20.55.008
Omega LadyMatic Co-Axial 34 Sedna Gold / Pearls and Diamonds

425.65.34.20.55.007
Omega LadyMatic Co-Axial 34 Sedna Gold Baguette / MOP / MOP Bracelet

123.50.27.20.53.001
Omega Constellation Co-Axial 27 Brushed Red Gold / Blue Supernova

231.55.34.20.55.003
Omega Seamaster Aqua Terra 150M Master Co-Axial 34 Sedna Gold / Diamond / MOP / Bracelet
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231.50.34.20.55.001
Omega Seamaster Aqua Terra 150M Master Co-Axial 34 Sedna Gold / MOP / Bracelet
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231.58.34.20.55.003
Omega Seamaster Aqua Terra 150M Master Co-Axial 34 Sedna Gold / Diamond / MOP
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231.53.34.20.55.001
Omega Seamaster Aqua Terra 150M Master Co-Axial 34 Sedna Gold / MOP
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231.50.30.20.55.002
Omega Seamaster Aqua Terra 150M Co-Axial 30 Yellow Gold / MOP / Bracelet
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231.50.30.20.55.001
Omega Seamaster Aqua Terra 150M Co-Axial 30 Red Gold / MOP / Bracelet
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232.63.38.20.04.001
Omega Seamaster Planet Ocean 600M Co-Axial 37.5 Red Gold / White Planet St. Moritz
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232.63.38.20.01.001
Omega Seamaster Planet Ocean 600M Co-Axial 37.5 Red Gold / Black / Alligator

123.50.27.20.57.002
Omega Constellation Co-Axial 27 Brushed Yellow Gold / Champagne MOP

123.55.27.20.57.002
Omega Constellation Co-Axial 27 Brushed Yellow Gold Diamond / Champagne MOP
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425.65.34.20.55.010
Omega LadyMatic Co-Axial 34 Sedna Gold / Diamond / MOP / Bracelet
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425.65.34.20.55.009
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet
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425.60.34.20.55.004
Omega LadyMatic Co-Axial 34 Sedna Gold / MOP / Bracelet
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425.60.34.20.55.003
Omega LadyMatic Co-Axial 34 Yellow Gold / MOP / Bracelet
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425.67.34.20.55.007
Omega LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP
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425.67.34.20.55.008
Omega LadyMatic Co-Axial 34 Sedna Gold / Diamond / MOP
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425.62.34.20.55.003
Omega LadyMatic Co-Axial 34 Yellow Gold / MOP
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425.62.34.20.55.004
Omega LadyMatic Co-Axial 34 Sedna Gold / MOP
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425.63.34.20.51.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Black
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425.60.34.20.51.002
Omega LadyMatic Co-Axial 34 Yellow Gold / Black / Bracelet
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425.63.34.20.55.002
Omega LadyMatic Co-Axial 34 Yellow Gold / MOP
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425.65.34.20.51.001
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / Black / Bracelet
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425.65.34.20.55.005
Omega LadyMatic Co-Axial 34 Red Gold / Diamond / MOP / Diamond Bracelet